Electric-motor-driven spring hammer



Dec. 7, 1926.

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Dec. 7,1926@ W. S. PAYNE* vELECTRIC MOTOR DRIVE SPRING HAMMER Filed July11, 1923 2 Sheets-Sheet cri.

A' Patented Dec. 1926i.

WALTER s.V PAYNE cir ,Uiiivnnsnr 'innen NEBRASKA.

Application ieaauiyii, .1323.ser'iai-Nb. starei:

This invention relates toan improvedv electric motor driven springhammer, and lis a simplification. and yimprovementy with respect to thedevice shown and described in my Patent 1,356,556, dated OctQGth, 1920.One objectfof Vthis inventionis to simplify and reducethecost ofmanufacturing a ma:v

chine of this character.byeliminating the liaminenlock andhammer-case-lock aswell as other parts which formed elementsv of theabove Vmentioned device (of Patent No. 11,356,556). Y .A e Y i Anotherobject is to it works in otherdevices of'thischaractenf Anotherobject-is tojdoublelthe numberv of'blo'ws-or hammer-strokes,'j ascompared.

nf, ZA)

,with'the number piroducedbyfa given numL` ber of `revolutions ofthecam-carrying shaftr that constitutes part of thehammer-driving emechanism;- i 'i Another' obj ect sion or weightwhich adds impact tothehammer. -v

Another object is to provide an improved,f yet comparatively simplespring-pressed` means foi1 automatically *and securely locking thehammer-case and cam-crosshead in their screw-threaded vengagement lwiththef Other objects and. advantages'. `will bei pointed out or'limpliedin.. the following details of description,v in` connectionv 'with y pinor Vother.securing iiieaiis;fAs-tlie"came the accompanying drawings inwhich:-

Fig. v11;, ifs-'a somewhat diagrammatic viewAV .whichwshows'theinterior-of the main shell (which mayV bev of any number of unitedvparts) and the elements contained therein;

' guide and cam-case.

Fig. 2 is a view. of the combined'cam-case and hammer-case, its:intermediate: part being broken out. i

Fig. 3 .'s a view of the combined hammer- Fig. 1 is a view of theihammeraudits extension orweight.v I I.

j Fig. 5 is a view showing threedifl'erent views of the doublecam-device in the same l u osition. 5o p' Fig. 6 is aj view` of the`gearing. which operatively shaft. A f

yVVithin'the main-shell, anl motor is. indicated :at 5, and its drivenshaftr" z carries a gear wheel'7 VwhichY meshes with lmake, the? hammer-.plunger work freer, in the hammer-case than f yis toprovide a simpleand-- f comparatively inexpensive hammer-extenconnects the motor tothecamf..

a gear wheelS whose shaft or axle also carries a gearwheel- 91the lattermeshingV with a gearfwheel 1 0 onfa'shaft or aXle 11. The shaft 11carries av cam-member 12 which VVis .the4 first elementtliiisfarfnanied.which is different .from the electro-mechanical drivingniechz'inisiiivA shownin my prior patent,

above mentioned.

rI helrotary'Cainmember 12' hasit's compleinentln 4no iirotaryVcani-'member 13V which i .is `securedl against rotation inl ia coiiibined hammerguide andfcamfcaseoi camguidingmeniberle and` reciprocat`esin the latter. A@ hammer-case or toolcarryiiig member 15. is providedwithlslots or-` 'ie cesses 15, A hammerl "isf in theI` hanimerfcase and'has arms" or 'legslT which lslide.Y

in slots; '14a ofthe member 14; andalso 'in theslots 15a ofslmemberlwhiclrare alinedwithV the slotsfleh- 'g These armshave `lugs Natl-iatfitiii lnotches 13a-ofthe `v,non-rotary cam `and 'are heldwiinfthesenotches-by the? pressure'of a spring 18'l whose rear end pressesagainstthe cani-case while its -fron'tV 1 end presses against the-hammerin the rela-' tion 'foi-l` shooting -they hammer forward;-y atV eachhalf'revolution'ofthe camm'ember V12. u i

shaftr'llfexten'dsthrough-fthe 'cam-1i3,' theV latter being in the Aformfof a hollow/cylin vIt lshoufldof course be understood that 'the deinVThe cainltZV is alsogin the form of a` hollow cyliiider,but its axialbore isfitted 1 around the-forward vendof the shaft 11,aii`d i securedf`thereto with a Vtapering diametral memberV 12vv rotates, its caiiiffacesslide on thosefof.thecainfl, and thisipi'ishes the lat; i .ter rearward.Vduring the travel of cam 127s f highest or rearmost points .toy thehighest or foremost vpoints of` the 13; but when these highest pointsvhave passed one another,

other as 'isshown 'in the drawing. This shooting forwardY Y' of the.hammer occurs.

.twice in each lrevolution ofthe `cam-member the spring'lfshcotsthehaminerj 'forwardIl 'l vand the canis-then-intermesh with one an12whichV has two diametrically opposite cam-faces, the cam 13 alsohavingY such opposite'cam faces.l Each Vtime thehammer is shot forward,its front .end strikes the vshank 19 ofthe riveting tool, 'chiselOrothei' ius' l v D fof the'spring 18, I providea rearward extensionQOMwhich may beef soft steel, or

wroughtiron andV has a screw-threaded.c`on-v neotion with the're'ar endof the hardened 'steel hammerhead. Thisweight 2O isr rela;

ytively long and of'snialler diameter than the interioro" the spring 18,and lit' itwere of hardened steel, or anintegrally formedpart i of thelialnmefsliead, itwouldhelikelyto `Vsiteholesofan internally threadedshell or `,hollow cylinder 24 whose'front end abut'sy break off inconsequence of the'vibratio'ns Caused byY the rapidly repeated Yimpacts.

llfhe mainbody of the member 20 lis cylindri-- cal and hasa sletaerossisits rear end for re- Y ceiving a screw-driver wherebyito screwor unscrevv it.

The Ca1n-case is lprovided with a diame,

tral bore Qln which carried two lockingv plnngers or pins 22, andbetween them-1s a,

spring '23y which pressesthem' outward through, slots 17'b intodiametrically. oppo-v against an annular shoulder 25' of the outercasing orY hammerfcasehousing;and the rear.

'91161. Offthamember ,abutsfaganst a ball-1vk bearingavwhich:'comes into`use when the l machine is used for'drilling orvboring Vasdesoribed-,inV thefprior-r patent; above named. rlfhe pins`22 extendthrough the recesses '15a i andgtheneeyinto diametlically disposedopeningsh. ofthe shell'f24, vand when thus `litted while the-pins areengaged with the shell Qh the iner'nbersjlt, l5 `and, 24 are iminovablylocked with relation to one another;and to unloclrthem, itis necessaryto pressV thepins 22inward vso that thelmemberslt') 'and 24 arey freefrom engagen'ient therewith. These p IlS o an be held depressed by any,appro-v priatemeansfWhilethese parts are being as. sernbled,y andl whenthey arevv releas,ed,gthe:

springo23automatically operates Vto cause the pins; to lock-them inV,the assembled relationa Each of these pins22hasia shoulder to limitavoid bearing` its OutwardV nioveinent4 and against the outer shell.

The parts not speeiicallydeseribedinpthisf specification :are: shown andY described in, one.l

angles .te il* rrnember,l said tool-@arr or more of my priorpatents,especially the one above referred to. Y f f Y o Al hough theY presentdrawings .show slots `l?? through the legs 17, itshould he under-v totheenact. details of `Construction'and var-VV rangement hereshownybutchangesyinay be.

made within theqseopefoi: the inventive .ideas as .implied and claimed.

llhat claim v as `niyinvention is t l.- In?amachine of the characterdescribed,

the coinhination of, a Canifguiding inenjiher having-s1 an rextern-al.ly4serew-threaded part and al reduced cylindrical part forming seat,torvf-acompression springend also hav,-

' inga radialnbore which latter opens-through said cylindrical part, atool-carrying ineinhaving. a Vscrewfthrea@ledbuter Surface; and a recessadiacenti@thetlattel, '21- hollow-Cyl? 'luder having internallythreaded' :part te mesh with the screwtlreadsfef the rfst; Seid memberand., tool-Carrying; melnber frfuntf ing them, and a spring-pressedpinLinsaidok/ 'ra-dial. bore andi normally pressed.. byrts springV sothat@ it extends: throughsaidfreeessV intee,11.segelnelett.Wn'Saidfhelow. Cylinder for locking the cam-guidingmember'-A andy wel- Carrying member and. hollow Cylinder mali/X601screw-threaded relation t0 one am other,

pin-,having @reduced Outer; end' Pertionfantl having an alnitinent7 saidhollowl Cylinder-V liaving Y an lopen-ing to f receive, .the reduced endortfion said Vabutmentnormali enea@- Y 27 23 ing thefwall of theopening' to prevent' theI pin freni passing outv through said'openin.

- Intestimony whereof I atixfmy signature.

. VALTER S; PAYNE.,

2- '-liefstruture defined .by Claim lJIA said,

